Studying the initial stages of gelation process in colloidal silica on basis of synthetic silicates by NMR microimaging and relaxometry
Abstract
The acid silicious sols obtained from synthetic silicates were investigated in this work. Using NMR microimaging it was found out the formation of considerable inhomogeneities in optically limpid samples at different stages of gel formation. They were interpreted as silicic acid polycondensation fronts. It was observed the character of spreading and fine structure of the fronts. By means of NMR relaxometry were discovered the some interesting effects at the relaxation dependences in time intervals, corresponding to gel formation transitional stages.
About the Authors
E. V. Morozov
Kirensky Institute of Physics SB RAS; Special Designing and Technological Bureau "Nauka"
Russian Federation
Russian Federation
Akademgorodok, 50, Krasnoyarsk 660036; Mira, 53, Krasnoyarsk 660049
O. V. Shabanova
Special Designing and Technological Bureau "Nauka"
Russian Federation
Russian Federation
Mira, 53, Krasnoyarsk 660049
V. F. Pavlov
Special Designing and Technological Bureau "Nauka"
Russian Federation
Russian Federation
Mira, 53, Krasnoyarsk 660049
O. V. Falaleev
Kirensky Institute of Physics SB RAS; Special Designing and Technological Bureau "Nauka"
Russian Federation
Russian Federation
Akademgorodok, 50, Krasnoyarsk 660036; Mira, 53, Krasnoyarsk 660049
References
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3. Shabanov V.F., Pavlov V.F., Pavlenko N.I. Stroilelnie Materiali, № 4, 40 (2002) (in Russian)
4. Callaghan P. Principles of nuclear magnetic resonance microscopy, Clarendon Press, Oxford (1991)
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Review
For citations:
Morozov E.V., Shabanova O.V., Pavlov V.F., Falaleev O.V. Studying the initial stages of gelation process in colloidal silica on basis of synthetic silicates by NMR microimaging and relaxometry. Magnetic Resonance in Solids. 2010;12(1):1-6.
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